Depression storage and infiltration effects on overland flow depth-velocity-friction at desert conditions: field plot results and model

摘要: Water infiltration and overland flow are relevant in considering water partition among plant life forms, the sustainability of vegetation design sustainable hydrological models management. In arid semi-arid regions, these processes present characteristic trends imposed by prevailing physical conditions upper soil as evolved under water-limited climate. A set plot-scale field experiments at Patagonian Monte (Argentina) were performed order to estimate effect depression storage areas rates on depths, velocities friction flows. The micro-relief undisturbed plots was characterized z -scale 1 mm through close-range stereo-photogrammetry geo-statistical tools. produced controlled inflows video-recorded measured with image processing software. Antecedent post-inflow moisture measured, texture, bulk density properties estimated based core analyses. Field data used calibrate a physically-based, mass balanced, time explicit model Modelling results reproduced series observed areas, depths. Estimates hydrodynamic parameters (Reynolds-Froude numbers) informed. To our knowledge, study here presented is novel combining several aspects that previous studies do not address simultaneously: (1) obtained conditions; (2) measurements movement coupled detailed analysis microtopography depth scale; (3) depth-velocity flows addressed. Relevance other similar desert justified accompanying biogeography similarity environment where this world.